Basler Electric SR32A2B05B3E Static Voltage Regulator

The Basler Electric SR32A2B05B3E is a compact static voltage regulator designed for small to medium‑sized synchronous generators. It provides automatic voltage regulation (AVR) by controlling the exciter field current based on the generator terminal voltage. The regulator is particularly suited for portable generators, marine auxiliary sets, and standby power systems where space and simplicity are important.

Regulation Performance

This regulator maintains the generator voltage within ±1% of the setpoint from no‑load to full‑load, with a response time of less than 80 ms. It features adjustable gain and stability controls to match different generator and exciter characteristics. A built‑in voltage ramp function ensures smooth voltage build‑up during starting, preventing overshoot and system disturbances.

Adjustable Settings

The SR32A2B05B3E offers front‑panel trim potentiometers for voltage setpoint (range 90‑110% of nominal), stability (damping), and droop (0‑5% for parallel operation). An under‑frequency protection reduces excitation when the frequency drops below a preset threshold, protecting the generator from over‑excitation during overspeed or load rejection.

Technical Specifications

Input sensing: 120‑480 VAC, 50/60 Hz. Excitation output: 0‑90 VDC, up to 5 A. Power supply: derived from the sensing input (no separate supply needed). Accuracy: ±1% of setpoint. Operating temperature: –20°C to +60°C. The regulator is housed in a durable plastic enclosure with IP20 rating.

Protection and Diagnostic

The regulator includes short‑circuit protection on the field output, over‑voltage clamping, and thermal overload protection. A red LED indicates a fault condition, and a green LED confirms normal operation. An auxiliary output provides a signal for remote monitoring of excitation status.

Applications

Ideal for small diesel generators, wind turbines, and hydro turbines, the SR32A2B05B3E is also used in agricultural irrigation, telecommunications, and construction sites. Its simple setup and robust performance make it a popular choice for OEMs and system integrators.

Installation and Operation

Installation is straightforward: mount the unit on a panel or inside the generator control box, connect the sensing wires to the generator terminals, and attach the field leads to the exciter. No external power supply is needed. Operation is fully automatic; manual override can be achieved by adjusting the voltage setpoint.

Reliability and Quality

Basler Electric’s stringent quality control ensures the SR32A2B05B3E meets high reliability standards. The regulator is tested for vibration, humidity, and temperature cycling. With solid‑state construction, it requires minimal maintenance and offers a long service life.

Conclusion

The Basler Electric SR32A2B05B3E static voltage regulator is a cost‑effective, reliable solution for voltage control in small generator sets. Its compact size, easy adjustment, and durable design make it an excellent choice for diverse power generation applications.